record_version_state_after_migrating

# File activerecord/lib/active_record/migration.rb, line 530
      def record_version_state_after_migrating(version)
        sm_table = self.class.schema_migrations_table_name

        @migrated_versions ||= []
        if down?
          @migrated_versions.delete(version.to_i)
          Base.connection.update("DELETE FROM #{sm_table} WHERE version = '#{version}'")
        else
          @migrated_versions.push(version.to_i).sort!
          Base.connection.insert("INSERT INTO #{sm_table} (version) VALUES ('#{version}')")
        end
      end